I should say that my small tattoo barely registered as painful. Not that it didn't hurt, but it was on a less-sensitive spot and didn't take very long.

My belly piece took a little less than 2 hours, and there were moments of excruciating pain where I needed to take breaks. My back piece today took nearly 3 hours (outline only), and while I sat still for the whole thing, there were times when I either couldn't pay attention to anything else or desperately needed a distraction. Both of the larger pieces got puffy, hot and achy after several hours, and the belly tattoo made me sleepy and achy like having a low-grade flu for a few days.